iron-core 0.1.38

Core AgentIron loop, session state, and tool registry
Documentation 
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## Summary

## Issue
Closes #

## Testing
- [ ] `cargo build --manifest-path Cargo.toml --all-targets`
- [ ] `cargo fmt --manifest-path Cargo.toml -- --check`
- [ ] `cargo clippy --manifest-path Cargo.toml --all-targets --all-features -- -D warnings`
- [ ] `cargo test --manifest-path Cargo.toml`
- [ ] `cargo audit --file Cargo.lock`